TWI848282B - Composite QR code, printed matter, information processing system and program - Google Patents

Abstract

[Topic] Provide a composite two-dimensional code that can prevent mechanical and electronic copying. [Solution] The composite two-dimensional code is a combination of a first two-dimensional code and a second two-dimensional code, and includes a first unit having a first color, a second unit having a second color, and a third unit having a third color, wherein the first color, the second color, and the third color are different from each other, the first two-dimensional code is obtained through a first filtering process, and the second two-dimensional code is obtained through a second filtering process.

Description

Composite QR code, printed matter, information processing system and program

One embodiment of the present invention is related to a composite two-dimensional code synthesized with a two-dimensional code. Furthermore, one embodiment of the present invention is related to a printed matter printed with a composite two-dimensional code. Furthermore, one embodiment of the present invention is related to an information processing system for a composite two-dimensional code. Furthermore, one embodiment of the present invention is related to a program for executing a read process of a composite two-dimensional code.

Two-dimensional codes such as QR codes (registered trademarks) contain more information than one-dimensional barcodes, and users can easily obtain a large amount of information by simply reading the two-dimensional code. Therefore, in recent years, the use of two-dimensional codes has increased in various fields such as process management, inventory management, or settlement. For example, patent document 1 discloses a ticket with a two-dimensional code. In addition, patent document 2 discloses an insurance certificate with a two-dimensional code.

『Patent Literature』

"Patent Document 1": Japanese Patent Publication No. 2015-165342

"Patent Document 2": Japanese Patent Publication No. H11-221990

However, it is not uncommon for a two-dimensional code to be copied by a copier and used illegally (i.e., forgery of the two-dimensional code). Therefore, in order to prevent forgery of the two-dimensional code, patent document 1 discloses a two-dimensional code using inks with different reflective properties. Furthermore, patent document 2 discloses a two-dimensional code that will have a fake image attached to it when copied.

In Patent Documents 1 and 2, the main purpose is to prevent the forgery of the two-dimensional code of the printed matter copied by the copier. In other words, the purpose is to prevent mechanical copying. However, in recent years, the two-dimensional code is read by information terminals such as smart phones, and the opportunities for the direct use of the read electronic data have also increased. Therefore, in the use of two-dimensional codes, it is required not only to prevent mechanical copying, but also to prevent electronic copying.

In view of the above problems, one of the purposes of an embodiment of the present invention is to provide a composite two-dimensional code that can prevent mechanical and electronic copying. Furthermore, one of the purposes of an embodiment of the present invention is to provide a method for generating a composite two-dimensional code that can prevent mechanical and electronic copying. Furthermore, one of the purposes of an embodiment of the present invention is to provide a printed matter printed with a composite two-dimensional code that can prevent mechanical and electronic copying. Furthermore, one of the purposes of an embodiment of the present invention is to provide an information processing system that performs a read process of a composite two-dimensional code that can prevent mechanical and electronic copying. Furthermore, one of the purposes of an embodiment of the present invention is to provide a program that performs a read process of a composite two-dimensional code that can prevent mechanical and electronic copying.

A composite two-dimensional code related to one embodiment of the present invention is a composite two-dimensional code that is a combination of a first two-dimensional code and a second two-dimensional code and includes a first unit having a first color, a second unit having a second color, and a third unit having a third color, wherein the first color, the second color, and the third color are different from each other, the first two-dimensional code is obtained through a first filtering process, and the second two-dimensional code is obtained through a second filtering process.

The first filtering process can also be a subtractive or additive process for the second color, and the second filtering process can also be a subtractive or additive process for the first color.

The composite QR code may further include a first color code having a fourth color, a second color code having a fifth color, and a third color code having a sixth color, wherein the fourth color, the fifth color, and the sixth color are different from each other, the first QR code is further obtained through a first filtering process including color correction based on at least one of the first color code, the second color code, and the third color code, and the second QR code is further obtained through a second filtering process including color correction based on at least one of the first color code, the second color code, and the third color code.

The 1st color, 2nd color and 3rd color may also be the same as the 4th color, 5th color and 6th color respectively. The 4th color, 5th color and 6th color may also be red, green and blue respectively. The 4th color, 5th color and 6th color may also be cyan, magenta and yellow respectively.

The first color and the second color can also be in a complementary relationship. The third color can also be black.

The printed matter related to one embodiment of the present invention is printed with the above-mentioned composite QR code.

An information processing system related to an embodiment of the present invention includes: a first acquisition unit that performs a first filtering process on a composite two-dimensional code including a first unit having a first color, a second unit having a second color, and a third unit having a third color to obtain a first two-dimensional code, and a second acquisition unit that performs a second filtering process on the composite two-dimensional code to obtain a second two-dimensional code.

The first acquisition unit may also acquire the RGB value of the second unit from the image data of the composite two-dimensional code. When the RGB value of the second unit is included in the first range based on the RGB value of the second color, the first filtering process is performed to convert the color of the second unit into the third color, and the first two-dimensional code including the second unit and the third unit having the third color is acquired. The second acquisition unit may also acquire the RGB value of the first unit from the image data. When the RGB value of the first unit is included in the second range based on the RGB value of the first color, the second filtering process is performed to convert the color of the first unit into the third color, and the second two-dimensional code including the first unit and the third unit having the third color is acquired.

In the first filtering process, the color of the second unit not included in the first range and the color of the first unit can be further converted into the background color of the composite two-dimensional code. In the second filtering process, the color of the first unit not included in the second range and the color of the second unit can be further converted into the background color of the composite two-dimensional code.

The composite two-dimensional code may further include a first color code having a fourth color, a second color code having a fifth color, and a third color code having a sixth color, and may further include a calculation unit, which calculates the first difference value between the RGB value of the first color code and the RGB value of the fourth color, the second difference value between the RGB value of the second color code and the RGB value of the fifth color, and the third difference value between the RGB value of the third color code and the RGB value of the sixth color in the image data, and corrects the colors of the first unit, the second unit, and the third unit according to at least one of the first difference value, the second difference value, and the third difference value.

The first acquisition unit may also perform a first filtering process to convert the second unit with the second color in the image data of the composite two-dimensional code, and after obtaining the first two-dimensional code including the first unit with the first color and the third unit with the third color, obtain the first numerical information about the number of the first unit with the first color included in the composite two-dimensional code according to the obtained first two-dimensional code. The second acquisition unit may also perform a second filtering process to convert the first unit with the first color in the image data, and obtain the second numerical information about the number of the converted first unit with the first color. When the second numerical information satisfies the specified condition according to the first numerical information, the second two-dimensional code including the second unit with the second color and the third unit with the third color is obtained.

The specified condition can also be within the range where the second numerical information is greater than (1-a) times the first numerical information and less than (1+a) times the first numerical information, where a is a preset setting value.

The first acquisition unit may also perform a first filtering process to convert the second unit having the second color in the image data of the composite two-dimensional code, and after obtaining the first two-dimensional code including the first unit having the first color and the third unit having the third color, obtain first ratio information about the ratio of the first unit having the first color to the composite two-dimensional code based on the obtained first two-dimensional code. The second acquisition unit may also perform a second filtering process to convert the first unit having the first color in the image data, and obtain second ratio information about the ratio of the converted first unit having the first color to the composite two-dimensional code. When the second ratio information satisfies the specified condition based on the first ratio information, the second two-dimensional code including the second unit having the second color and the third unit having the third color is obtained.

The specified condition may also be within the range where the second ratio information is greater than (1-a) times the first ratio information and less than (1+a) times the first ratio information, where a is a preset setting value.

A program related to one embodiment of the present invention is executed on a computer: a first filtering process is performed on a composite two-dimensional code including a first unit having a first color, a second unit having a second color, and a third unit having a third color to obtain a first two-dimensional code, and a second filtering process is performed on the composite two-dimensional code to obtain a second two-dimensional code.

In the first filtering process, the RGB value of the second unit can also be obtained from the image data of the composite two-dimensional code. When the RGB value of the second unit is included in the first range based on the RGB value of the second color, the color of the second unit is converted to the third color. In the second filtering process, the RGB value of the first unit can also be obtained from the image data. When the RGB value of the first unit is included in the second range based on the RGB value of the first color, the color of the first unit is converted to the third color. The first two-dimensional code can also include the second unit and the third unit having the third color, and the second two-dimensional code can also include the first unit and the third unit having the third color.

The composite QR code may further include the first color code with the fourth color, the second color code with the fifth color, and the third color code with the sixth color. The computer may further perform the following steps: in the image data, calculate the first difference between the RGB value of the first color code and the RGB value of the fourth color, the second difference between the RGB value of the second color code and the RGB value of the fifth color, and the third difference between the RGB value of the third color code and the RGB value of the sixth color. Based on at least one of the first difference, the second difference, and the third difference, calibrate the colors of the first unit, the second unit, and the third unit.

Alternatively, the first filtering process of converting the second unit with the second color may be performed in the image data of the composite two-dimensional code, and after obtaining the first two-dimensional code including the first unit with the first color and the third unit with the third color, the first numerical information about the number of the first unit with the first color included in the composite two-dimensional code may be obtained based on the obtained first two-dimensional code. Alternatively, the second filtering process of converting the first unit with the first color may be performed in the image data, and the second numerical information about the number of the converted first unit with the first color may be obtained. When the second numerical information satisfies the specified condition based on the first numerical information, the second two-dimensional code including the second unit with the second color and the third unit with the third color may be obtained.

Alternatively, the first filtering process of converting the second unit having the second color may be performed in the image data of the composite two-dimensional code, and after obtaining the first two-dimensional code including the first unit having the first color and the third unit having the third color, first ratio information about the ratio of the first unit having the first color to the composite two-dimensional code may be obtained based on the obtained first two-dimensional code. Alternatively, the second filtering process of converting the first unit having the first color may be performed in the image data, and second ratio information about the ratio of the converted first unit having the first color to the composite two-dimensional code may be obtained. When the second ratio information satisfies the specified condition based on the first ratio information, the second two-dimensional code including the second unit having the second color and the third unit having the third color may be obtained.

Since the composite two-dimensional code related to one embodiment of the present invention includes multiple two-dimensional codes, it can include more information than one two-dimensional code. Moreover, since the composite two-dimensional code includes units of multiple colors, it is not easy to mechanically accurately copy the color or shape. Moreover, in the composite two-dimensional code, information can only be obtained by performing a filtering process to separate the synthesized two-dimensional code into individual codes. Therefore, according to the composite two-dimensional code, not only mechanical copying but also electronic copying can be prevented.

10,10A,10B,10D: Information processing system

11,11A,11B: Information terminal

12A: Server

13B: Color filter

100: Control Department

101: Part 1 Acquisition

102: Part 2 Acquisition

103D: Calculation Department

110: Camera Department

120: Display unit

130A: 1st Communications Department

140A: 2nd Communications Department

300,300D: Composite QR code

301: Unit 1

302: Unit 2

303: Unit 3

304: Cut mark

305D, 305E, 305F: Color code pattern section

305D-1, 305E-1, 305F-1: 1st color code

305D-2, 305E-2, 305F-2: 2nd color code

305D-3, 305E-3, 305F-3: 3rd color code

305D-4,305F-4: 4th color code

310,310B-1,310B-2: Image data

320: QR code

320-1: QR code No. 1

320-2: 2nd QR code

330-1: QR code No. 1

330-2: 2nd QR code

340-1: QR code No. 1

340-2: 2nd QR code

410: Printed materials

420: Image

510:Items

520: Display device

〈Figure 1〉 is a schematic diagram showing the structure of a composite two-dimensional code related to one embodiment of the present invention.

〈Figure 2〉 is a schematic diagram showing an example of the use of a composite two-dimensional code related to one embodiment of the present invention.

〈Figure 3〉 is a block diagram showing the structure of an information processing system for performing a composite two-dimensional code reading process related to one embodiment of the present invention.

〈Figure 4〉 is a flow chart of the reading process of a composite two-dimensional code related to one embodiment of the present invention.

〈Figure 5〉 is a schematic diagram illustrating the first acquisition process of obtaining the first two-dimensional code from a composite two-dimensional code related to one embodiment of the present invention.

〈Figure 6〉 is a schematic diagram illustrating the second acquisition process of obtaining a second two-dimensional code from a composite two-dimensional code related to one embodiment of the present invention.

〈Figure 7〉 is a schematic diagram illustrating the generation and processing of a composite two-dimensional code related to one embodiment of the present invention.

〈Figure 8〉 is a block diagram showing the structure of an information processing system for performing a composite two-dimensional code reading process related to one embodiment of the present invention.

〈Figure 9〉 is a flowchart of the reading process of a two-dimensional code related to one embodiment of the present invention.

〈Figure 10〉 is a schematic diagram illustrating the structure of an information processing system for performing a composite two-dimensional code reading process related to one embodiment of the present invention.

〈Figure 11〉 is a flow chart of the reading process of a composite two-dimensional code related to one embodiment of the present invention.

〈Figure 12〉 is a flowchart of the reading process of a composite two-dimensional code related to one embodiment of the present invention.

〈Figure 13〉 is a schematic diagram showing the structure of a composite two-dimensional code related to one embodiment of the present invention.

〈Figure 14〉 is a block diagram showing the structure of an information processing system for performing a composite two-dimensional code reading process related to one embodiment of the present invention.

〈Figure 15〉 is a flow chart of the reading process of a composite two-dimensional code related to one embodiment of the present invention.

〈Figure 16〉 is a schematic diagram showing the structure of another color code pattern portion included in a composite two-dimensional code related to one embodiment of the present invention.

〈Figure 17〉 is a flowchart of the reading process of a composite two-dimensional code related to one embodiment of the present invention.

The following is a description of various embodiments of the present invention with reference to the drawings. However, the present invention can be implemented in various forms without departing from its gist, and is not limited to the description of the embodiments exemplified below.

In order to make the description clearer, the drawings show schematic representations of the width, thickness, shape, etc. of each part compared to the actual state, but it is only an example and does not limit the interpretation of the present invention. In addition, in this manual and each figure, the same symbols are sometimes used to mark the elements with the same functions as those described in the existing figures, and repeated descriptions are omitted.

In this manual and drawings, when collectively marking multiple identical or similar structures, the same symbol may be used or capital letters may be added to the same symbol. When distinguishing and marking multiple parts of a structure, the same symbol may be used and a hyphen and a natural number may be used.

In this manual, the terms "1st", "2nd" or "3rd" marked on each structure are used as convenient identifiers to distinguish each structure and have no other meaning unless otherwise specified.

In this manual, the so-called "two-dimensional code" refers to a code with two-dimensional display format that has information in the horizontal and vertical directions. Two-dimensional code is, for example, QR code (registered trademark), but is not limited to this.

〈First Implementation Form〉

Referring to Figures 1 to 7, a composite two-dimensional code 300 related to one embodiment of the present invention is described.

[1. Structure of composite QR code]

FIG1 is a schematic diagram showing the structure of a composite two-dimensional code 300 related to one embodiment of the present invention.

As shown in FIG. 1 , the composite two-dimensional code 300 includes a plurality of first units 301 having a first color, a plurality of second units 302 having a second color, and a plurality of third units 303 having a third color. Furthermore, the composite two-dimensional code 300 shown in FIG. 1 includes three cutting marks 304 having a third color.

The three cutting marks 304 are arranged at the positions corresponding to the vertices of the square. The cutting marks 304 serve as the benchmark for reading the QR code. That is, in reading the QR code, the designated QR code can be identified by detecting the positions, inclinations or sizes of the three cutting marks 304. Therefore, the cutting marks 304 can also be called position detection patterns. In addition, the number of cutting marks 304 is not limited to 3. The number of cutting marks 304 can also be, for example, 1.

Multiple first units 301, multiple second units 302, and multiple third units 303 are arranged in the horizontal and vertical directions within a rectangular area surrounded by three cutting marks 304. The information contained in the two-dimensional code is determined by the arrangement of the first unit 301, the second unit 302, or the third unit 303.

The composite two-dimensional code 300 shown in FIG. 1 is a so-called QR code (registered trademark). For convenience, the composite two-dimensional code 300 is described below in the form of a QR code (registered trademark), but the composite two-dimensional code 300 is not limited to a QR code (registered trademark).

The first color, the second color, and the third color are any colors that are different from each other. However, it is preferred that the first color and the second color are in a complementary color relationship. For example, when the first color is red, the second color is cyan. Furthermore, when the first color is magenta, the second color is green. Furthermore, it is preferred that the third color is different from the first color and the second color in hue, chroma, or brightness. For example, when the first color and the second color are in a complementary color relationship, the third color is black. In addition, the composite two-dimensional code 300 includes a background color that is different from the first color, the second color, and the third color. The background color is preferably white, but is not limited thereto. The background color may also be transparent.

FIG. 2 is a schematic diagram showing an example of the use of a composite two-dimensional code 300 related to one embodiment of the present invention.

FIG2 (A) is an example of a situation where the composite two-dimensional code 300 is printed on a printed matter 410 and the printed matter 410 is attached to an object 510. In this case, the composite two-dimensional code 300 may include information about the object 510. Since the composite two-dimensional code 300 includes information about the object 510, the information of the composite two-dimensional code 300 can be read from the printed matter 410 attached to the object 510, thereby obtaining information about the object 510.

The printed matter 410 is, for example, paper or film, but is not limited thereto. Furthermore, as a means of printing the composite two-dimensional code 300 on the printed matter 410, for example, relief printing, lithographic printing, gravure printing, screen printing, electronic photo printing, inkjet printing, or laser printing can be used, but is not limited thereto. Furthermore, when printing the composite two-dimensional code 300, movable type ink, lithographic ink, screen printing ink, thermal curing ink, ultraviolet curing ink, magnetic ink, or UV fluorescent ink can be used, but is not limited thereto.

In addition, the composite two-dimensional code 300 can also be printed directly on the object 510 without the need for an intermediate printed material 410. Furthermore, the composite two-dimensional code 300 can also include information other than the object 510.

FIG2 (B) is an example of a situation where the composite two-dimensional code 300 is displayed on the display device 520 in the form of an image 420. In this case, the composite two-dimensional code 300 can include any information in accordance with the manner in which the image 420 is used. For example, when the image 420 is used for settlement, the composite two-dimensional code 300 can include settlement information. The user can read the settlement information of the composite two-dimensional code 300 from the image 420 and perform settlement processing.

The display device 520 is a display interface that can display data or information. As the display device 520, for example, a liquid crystal display device or an OLED (Organic Light-Emitting Diode) display device can be used.

As described above, the composite two-dimensional code 300 is printed on a printed matter 410 or an object 510 or displayed on an image 420 for use. In either case, the information contained in the composite two-dimensional code 300 can be obtained by reading the composite two-dimensional code 300.

The composite two-dimensional code 300 is composed of two two-dimensional codes. Therefore, the composite two-dimensional code 300 can contain about twice the information of one two-dimensional code. In the composite two-dimensional code 300, one piece of information is divided, and the two divided pieces of information can be made to be included in two two-dimensional codes, or the two pieces of information can be included in each of the two two-dimensional codes. When the composite two-dimensional code 300 contains two pieces of information, the two pieces of information can be related to each other, or they can be independent pieces of information that are not related to each other. The following describes the reading process of the composite two-dimensional code 300.

〔2. Reading and processing of composite QR code 300〕

FIG3 is a block diagram showing the structure of an information processing system 10 for performing a reading process of a composite two-dimensional code 300 related to one embodiment of the present invention.

The information processing system 10 includes an information terminal 11 that can read the composite two-dimensional code 300. The information terminal 11 is, for example, a mobile phone, a smart phone, a tablet computer, or a personal computer, but is not limited thereto. Specifically, in the information processing system 10, the information terminal 11 can be used to photograph a printed matter 410, an object 510, or an image 420 including the composite two-dimensional code 300, and a regular two-dimensional code can be obtained from the photographed composite two-dimensional code 300.

In the information processing system 10, the program can be installed in the information terminal 11 to perform the two-dimensional code generation process. In addition, in the information processing system 10, the program can also be stored in a recording medium (such as a CD-ROM or DVD-ROM, etc.), and the recording medium can be read out by the information terminal 11 to perform the two-dimensional code generation process by the information terminal 11.

As shown in FIG3 , the information processing system 10 includes a control unit 100, an imaging unit 110, and a display unit 120. Furthermore, the control unit 100 includes a first acquisition unit 101 and a second acquisition unit 102.

The control unit 100 is a computer that can use data or information for calculation and processing. The control unit 100 includes, for example, a central processing unit (CPU), a microprocessor (MPU), a graphics processing unit (GPU), or a random access memory (RAM). Specifically, the control unit 100 can execute a program to enable the first acquisition unit 101 and the second acquisition unit 102 to function. In addition, the details of the first acquisition unit 101 and the second acquisition unit 102 will be described later.

The imaging unit 110 is an imaging device that can photograph a printed matter 410, an object 510, or an image 420. Specifically, the imaging unit 110 can photograph a printed matter 410, an object 510, or an image 420 including a composite two-dimensional code 300, and generate image data 310 including the composite two-dimensional code 300. As the imaging unit 110, for example, a camera or a scanner can be used.

The display unit 120 is a display interface that can display the photographed printed matter 410, object 510 or image 420 including the composite QR code 300. As the display unit 120, for example, a liquid crystal display device or an OLED display device can be used.

The first acquisition unit 101 performs the first filtering process to obtain the first two-dimensional code from the image data 310. The first filtering process is a second color reduction process. Specifically, the second color reduction process is a process of converting the second color into a background color. When the first filtering process is performed on the image data 310, the second color is converted into a background color, and the second unit 302 having the second color can be eliminated. Therefore, through the first filtering process, the image data 310 is converted into a first two-dimensional code including a plurality of first units 301 having the first color, a plurality of third units 303 having the third color, and three cut marks 304 having the third color.

In addition, the first filtering process may also be an additive process for the second color of the image data 310. Specifically, the additive process for the second color is a process for converting the background color into the second color. In this case, since the background of the image data 310 and the second unit 302 become the same second color, the second unit 302 can be eliminated as a result.

Furthermore, in the first filtering process, the first color of the first unit 301 can also be converted. For example, the first color can also be converted into the third color through the first filtering process.

The second acquisition unit 102 performs the second filtering process to obtain the second two-dimensional code from the image data 310. The second filtering process is a color reduction process of the first color. Specifically, the color reduction process of the first color is a process of converting the first color into a background color. When the second filtering process is performed on the image data 310, the first color is converted into a background color, and the first unit 301 having the first color can be eliminated. Therefore, by the second filtering process, the image data 310 is converted into a second two-dimensional code including a plurality of second units 302 having a second color, a plurality of third units 303 having a third color, and three cut marks 304 having a third color.

In addition, the second filtering process may also be an additive process for the first color of the image data 310. Specifically, the additive process for the first color is a process for converting the background color into the first color. In this case, since the background of the image data 310 and the first unit 301 become the same first color, the first unit 301 can be eliminated as a result.

Furthermore, in the second filtering process, the second color of the second unit 302 can also be converted. For example, the second color can also be converted into the third color through the second filtering process.

FIG. 4 is a flowchart of a reading process of a composite two-dimensional code 300 related to an embodiment of the present invention. FIG. 5 is a schematic diagram illustrating a first acquisition process of obtaining a first two-dimensional code 320-1 from a composite two-dimensional code 300 related to an embodiment of the present invention. FIG. 6 is a schematic diagram illustrating a second acquisition process of obtaining a second two-dimensional code 320-2 from a composite two-dimensional code 300 related to an embodiment of the present invention.

The reading process of the composite two-dimensional code 300 is started by executing the program for the reading process of the composite two-dimensional code 300 in the information processing system 10.

In step S100, the imaging unit 110 generates image data 310 from a printed matter 410, an object 510, or an image 420 including a composite two-dimensional code 300. For example, the user photographs the printed matter 410, the object 510, or the image 420 using the imaging unit 110 of the information processing system 10, and the imaging unit 110 can generate the image data 310.

In step S110, the first acquisition unit 101 performs the first filtering process on the image data 310 and obtains the first two-dimensional code 320-1 from the image data 310. As shown in FIG5, when the image data 310 is subjected to the second color reduction process as the first filtering process, the first two-dimensional code 320-1 is generated in which the second unit 302 having the second color is eliminated. That is, the first two-dimensional code 320-1 includes a plurality of first units 301 having the first color, a plurality of third units 303 having the third color, and three cut marks 304 having the third color.

In step S120, the second acquisition unit 102 performs a second filtering process on the image data 310 and obtains a second two-dimensional code 320-2 from the image data 310. As shown in FIG6, when the image data 310 is subjected to a first color reduction process as the second filtering process, a second two-dimensional code 320-2 is generated in which the first unit 301 having the first color is eliminated. That is, the second two-dimensional code 320-2 includes a plurality of second units 302 having the second color, a plurality of third units 303 having the third color, and three cut marks 304 having the third color.

In step S130, the display unit 120 displays the first two-dimensional code 320-1 or the second two-dimensional code 320-2. The user can obtain the information contained in the first two-dimensional code 320-1 or the second two-dimensional code 320-2 according to the displayed first two-dimensional code 320-1 or the second two-dimensional code 320-2.

The reading process of the composite two-dimensional code 300 ends by executing step S130.

〈Variation 1 of the first implementation form〉

In the reading process of the composite two-dimensional code 300 related to the first embodiment, the first acquisition unit 101 and the second acquisition unit 102 acquire the first two-dimensional code 320-1 and the second two-dimensional code 320-2, respectively. In this variant, in step S110, the first acquisition unit 101 further acquires information included in the first two-dimensional code 320-1, and in step S120, the second acquisition unit 102 further acquires information included in the second two-dimensional code 320-2. In this case, in step S130, the display unit 120 can display the information included in the first two-dimensional code 320-1 or the information included in the second two-dimensional code 320-2, instead of the first two-dimensional code 320-1 or the second two-dimensional code 320-2. The user can directly obtain the information contained in the composite QR code 300 from the composite QR code 300.

In addition, the information presented to the user is not limited to the information contained in the first QR code 320-1 or the second QR code 320-2. The user may also be presented with information related to the information contained in the first QR code 320-1 or the second QR code 320-2, or information derived from the information contained in the first QR code 320-1 or the second QR code 320-2 (e.g., information on the result of the authenticity determination of the item 510). For convenience, the following description will define such information as the information attached to the QR code.

As described above, by using the information processing system 10, two two-dimensional codes 320 (first two-dimensional code 320-1 and second two-dimensional code 320-2) can be obtained from the composite two-dimensional code 300. The two two-dimensional codes 320 may contain information related to each other or may contain individual independent information. The following describes the generation process of the composite two-dimensional code 300.

〔3. Generation and processing of composite QR codes〕

FIG. 7 is a schematic diagram illustrating the generation process of a composite two-dimensional code 300 related to one embodiment of the present invention.

As shown in (A) of FIG. 7 , a first two-dimensional code 330-1 including the first information and a second two-dimensional code 330-2 including the second information are generated.

Then, as shown in FIG. 7 (B), the first two-dimensional code 330-1 is converted into the first color. Thus, the first two-dimensional code 340-1 including a plurality of first units having the first color and three cutting marks can be generated. Similarly, the second two-dimensional code 330-2 is converted into the second color. Thus, the second two-dimensional code 340-2 including a plurality of second units having the second color and three cutting marks can be generated.

Then, as shown in FIG. 7 (C), the first two-dimensional code 340-1 and the second two-dimensional code 340-2 are combined. Specifically, the first two-dimensional code 340-1 and the second two-dimensional code 340-2 are combined in such a way that the three cut marks of each of the first two-dimensional code 340-1 and the second two-dimensional code 340-2 overlap. At this time, the third unit where the first unit of the first two-dimensional code 340-1 and the second unit of the second two-dimensional code 340-2 overlap is converted to the third color. The three cut marks of each of the first two-dimensional code 340-1 and the second two-dimensional code 340-2 also overlap, so these are also converted to the third color. In this way, a composite two-dimensional code 300 including a plurality of first units having a first color, a plurality of second units having a second color, a plurality of third units having a third color, and three cutting marks can be generated.

As described above, the generated composite two-dimensional code 300 is printed on a printed matter 410 or an object 510 or displayed in the form of an image 420 for use.

〈Variation 2 of the first implementation form〉

Although the composite two-dimensional code 300 described above is a composite of the first two-dimensional code 320-1 and the second two-dimensional code 320-2 (in the generation of the composite two-dimensional code 300, the first two-dimensional code 340-1 and the second two-dimensional code 340-2 are composited), the composite two-dimensional code 300 may also be a composite of three or more two-dimensional codes. When n (n is a natural number greater than 2) two-dimensional codes 320 are composited, the composite two-dimensional code 300 includes units composed of n+1 or more colors.

As described above, the composite two-dimensional code 300 related to the present embodiment includes multiple two-dimensional codes, and therefore can include more information than one two-dimensional code. Furthermore, since the composite two-dimensional code 300 includes multi-color units, it is not easy to mechanically accurately copy the color or shape. Moreover, in the composite two-dimensional code 300, information can only be obtained by performing a filtering process to separate the synthesized two-dimensional code into individual codes. Therefore, the composite two-dimensional code 300 is a two-dimensional code that can prevent not only mechanical copying but also electronic copying.

〈Second Implementation Form〉

Referring to FIG. 8 and FIG. 9 , the reading process of the composite two-dimensional code 300 different from the first embodiment is described. Specifically, in this embodiment, the information processing system 10A is used instead of the information processing system 10 to perform the reading process of the composite two-dimensional code 300. In addition, when the structure of the information processing system 10A is the same as that of the information processing system 10, its description may be omitted.

FIG8 is a block diagram showing the structure of an information processing system 10A for performing a reading process of a composite two-dimensional code 300 related to one embodiment of the present invention.

The information processing system 10A includes an information terminal 11A and a server 12A. The information terminal 11A can communicate with the server 12A via a network NW. The network NW can be wired or wireless. For example, the network NW is a LAN (Local Area Network) or the Internet, but is not limited thereto.

The information terminal 11A is a terminal that can capture a printed material 410, an object 510, or an image 420 including a composite QR code 300 and generate image data 310. The information terminal 11A is, for example, a mobile phone, a smart phone, a tablet computer, or a personal computer, but is not limited thereto.

The server 12A is software or a computer that can provide the image data 310 from the information terminal 11A and obtain the first two-dimensional code 320-1 and the second two-dimensional code 320-2. In addition, when the server 12A is a computer, the server 12A can be one computer or multiple computers.

As described above, the information processing system 10A has an information terminal 11A and a server 12A, and the image data 310 generated by the information terminal 11A is sent to the server 12A. In the server 12A, the first QR code 320-1 and the second QR code 320-2 are obtained from the sent image data 310. In addition, the information processing system 10A can also obtain the first QR code 320-1 and the second QR code 320-2 through cloud computing or ASP (Application Service Provider) methods.

As shown in FIG8 , the information terminal 11A of the information processing system 10A includes an imaging unit 110, a display unit 120, and a first communication unit 130A. The server 12A of the information processing system 10A includes a control unit 100 and a second communication unit 140A. Furthermore, the control unit 100 includes a first acquisition unit 101 and a second acquisition unit 102.

The first communication unit 130A and the second communication unit 140A are communication interfaces that can send or receive data or information by wire or wireless. For example, a LAN module or a Wi-Fi (registered trademark) module can be used as the first communication unit 130A and the second communication unit 140A.

FIG9 is a flow chart of the reading process of the composite two-dimensional code 300 related to one embodiment of the present invention.

The reading process of the composite two-dimensional code 300 starts by executing the program for the reading process of the composite two-dimensional code 300 in the information terminal 11A.

In step S100, the imaging unit 110 generates image data 310 from a printed material 410, an object 510, or an image 420 including a composite two-dimensional code 300.

In step S105A, the first communication unit 130A sends the image data 310. The sent image data 310 is received by the second communication unit 140A.

In step S110, the first acquisition unit 101 performs the first filtering process on the image data 310 and acquires the first two-dimensional code 320-1 from the image data 310.

In step S120, the second acquisition unit 102 performs a second filtering process on the image data 310 and acquires a second two-dimensional code 320-2 from the image data 310.

In step S125A, the second communication unit 140A sends the first two-dimensional code 320-1 and the second two-dimensional code 320-2. The sent first two-dimensional code 320-1 and the second two-dimensional code 320-2 are received by the first communication unit 130A.

In step S130, the display unit 120 displays the first two-dimensional code 320-1 or the second two-dimensional code 320-2.

The reading process of the composite two-dimensional code 300 ends by executing step S130.

〈Variation of the second implementation form〉

In the reading process of the composite two-dimensional code 300 related to the second embodiment, the server 12A obtains the first two-dimensional code 320-1 and the second two-dimensional code 320-2, and sends the obtained first two-dimensional code 320-1 and the second two-dimensional code 320-2 to the information terminal 11A. In this variation, the server 12A can obtain the information included in the first two-dimensional code 320-1 and the information included in the second two-dimensional code 320-2, and send the obtained information included in the first two-dimensional code 320-1 and the information included in the second two-dimensional code 320-2 to the information terminal 11A. In this case, in step S130, the display unit 120 may display the information included in the first two-dimensional code 320-1 or the information included in the second two-dimensional code 320-2, instead of the first two-dimensional code 320-1 or the second two-dimensional code 320-2. The user may directly obtain the information included in the composite two-dimensional code 300 from the composite two-dimensional code 300. In addition, the information sent from the server 12A to the information terminal 11A and the information displayed on the display unit 120 may also be the information attached to the first two-dimensional code 320-1 or the second two-dimensional code.

As described above, even in the reading process of the composite two-dimensional code 300 related to the present embodiment, information can only be obtained by performing a filtering process to separate the composite two-dimensional code into individual codes. Therefore, not only mechanical copying of the two-dimensional code can be prevented, but also electronic copying can be prevented.

〈Third Implementation Form〉

Referring to FIG. 10 and FIG. 11, the reading process of the composite two-dimensional code 300 different from the first embodiment is further described. Specifically, in this embodiment, the information processing system 10B is used instead of the information processing system 10 to perform the reading of the composite two-dimensional code 300. In addition, when the structure of the information processing system 10B is the same as that of the information processing system 10, its description may be omitted.

FIG. 10 is a schematic diagram illustrating the structure of an information processing system 10B for performing a reading process of a composite two-dimensional code 300 related to one embodiment of the present invention.

The information processing system 10B includes an information terminal 11B and a color filter 13B. The information terminal 11B can photograph a printed material 410, an object 510 or an image 420 including a composite two-dimensional code 300 through the color filter 13B to obtain the information included in the composite two-dimensional code 300.

The color filter 13B can transmit light of a specified color. When the color filter 13B that transmits light of the first color is superimposed on the composite two-dimensional code 300, only light of the first color is transmitted in the total reflected residual white and the first unit 301 having the first color. Therefore, the residual white and the first unit 301 become to appear to be the same color (that is, the first unit 301 appears to have disappeared), becoming the background having the first color. Moreover, in the second unit 302 having the second color and the third unit 303 having the third color, since the color filter 13B absorbs light other than the first color and reduces the transmitted light, it becomes darker, and the second unit 302 and the third unit 303 become to appear to be almost the same color (for convenience, it is explained in the form of the fourth color). Therefore, the composite two-dimensional code 300 with the color filter 13B that transmits the light of the first color superimposed will be converted into a two-dimensional code including a background with the first color and a unit with the fourth color. This corresponds to the second filtering process of the first implementation type.

Similarly, when the color filter 13B that transmits the light of the second color is superimposed on the composite two-dimensional code 300, only the light of the second color is transmitted in the total reflected residual white and the second unit 302 having the second color. Therefore, the residual white and the second unit 302 become the same color (that is, the second unit 302 appears to have disappeared), becoming the background of the second color. In addition, in the first unit 301 having the first color and the third unit 303 having the third color, since the color filter 13B absorbs light other than the second color and reduces the transmitted light, it becomes darker, and the first unit 301 and the third unit 303 become the fourth color. Therefore, the composite two-dimensional code 300 with the color filter 13B that transmits the second color of light superimposed is converted into a two-dimensional code including a background with the second color and a unit with the fourth color. This corresponds to the first filtering process of the first implementation. Therefore, the following will describe the process of superimposing the color filter 13B that transmits the second color as the first filtering process, and the process of superimposing the color filter 13B that transmits the first color as the second filtering process.

As shown in FIG10 , the information terminal 11B of the information processing system 10B includes an imaging unit 110 and a display unit 120.

FIG11 is a flowchart of the reading process of the composite two-dimensional code 300 related to one embodiment of the present invention.

The reading process of the composite two-dimensional code 300 is started by executing the program for the reading process of the composite two-dimensional code 300 in the information processing system 10B.

In step S110B, the imaging unit 110 generates image data 310B-1 from the printed material 410, the object 510 or the image 420 including the composite two-dimensional code 300 that has been subjected to the first filtering process by the color filter 13B. The image data 310B-1 includes the first two-dimensional code 320-1. That is, in step S110B, the first two-dimensional code 320-1 can be obtained.

In step S120B, the imaging unit 110 generates image data 310B-2 from the printed material 410, the object 510, or the image 420 containing the composite two-dimensional code 300 that has been subjected to the second filtering process by the color filter 13B. The image data 310B-2 includes the second two-dimensional code 320-2. That is, in step S120B, the second two-dimensional code 320-2 can be obtained.

In step S130, the display unit 120 displays the first two-dimensional code 320-1 or the second two-dimensional code 320-2. The user can obtain the information contained in the first two-dimensional code 320-1 or the second two-dimensional code 320-2 according to the displayed first two-dimensional code 320-1 or the second two-dimensional code 320-2.

The reading process of the composite two-dimensional code 300 ends by executing step S130.

〈Variation of the third implementation form〉

In the reading process of the composite two-dimensional code 300 related to the third embodiment, the information terminal 11B obtains the first two-dimensional code 320-1 and the second two-dimensional code 320-2. In this variation, the information terminal 11B further obtains the information contained in the first two-dimensional code 320-1 and the information contained in the second two-dimensional code 320-2. In this case, in step S130, the display unit 120 can display the information contained in the first two-dimensional code 320-1 or the information contained in the second two-dimensional code 320-2 instead of the first two-dimensional code 320-1 or the second two-dimensional code 320-2. The user can directly obtain the information contained in the composite two-dimensional code 300 from the composite two-dimensional code 300. In addition, the user may also be prompted with the information attached to the first QR code 320-1 or the second QR code.

As described above, even in the reading process of the composite two-dimensional code 300 related to the present embodiment, information can only be obtained by performing a filtering process to separate the synthesized two-dimensional code into individual codes. Therefore, not only mechanical copying of the two-dimensional code can be prevented, but also electronic copying can be prevented.

〈Fourth Implementation Form〉

Referring to FIG. 12 , the reading process of the composite two-dimensional code 300 different from the first to third embodiments is described. Specifically, the details of the first filtering process and the second filtering process are described below. The reading process of the composite two-dimensional code 300 in this embodiment can be performed using the information processing system 10, and the first acquisition unit 101 and the second acquisition unit 102 included in the control unit 100 can realize further functions. The following description of the same structure as the above-mentioned structure is omitted.

The first acquisition unit 101 acquires the RGB values of the second unit 302 and the third unit 303 from the image data 310. When the acquired RGB values are within the specified range, the colors of the second unit 302 and the third unit 303 can be converted into the third color.

The second acquisition unit 102 acquires the RGB values of the first unit 301 and the third unit 303 from the image data 310. When the acquired RGB values are within the specified range, the colors of the first unit 301 and the third unit 303 can be converted into the third color.

FIG. 12 is a flowchart of the reading process of the composite two-dimensional code 300 related to one embodiment of the present invention.

The reading process of the composite two-dimensional code 300 is started by executing the program for the reading process of the composite two-dimensional code 300 in the information processing system 10.

In step S112C, the first acquisition unit 101 performs the first filtering process on the image data 310. Depending on the information terminal 11, the photographing method, or the photographing conditions, the colors of the first unit 301, the second unit 302, and the third unit 303 of the image data 310 may have differences in hue, saturation, or brightness. Therefore, in the first filtering process of the present embodiment, the filtering process is performed in consideration of the differences in each color. Specifically, when the RGB value (R ₂ , G ₂ , B ₂ ) of the second unit 302 obtained from the image data 310 is near the preset RGB value of the second color, the RGB value (R ₂ , G ₂ , B ₂ ) of the second unit 302 is converted into the preset RGB value of the third color. For example, when the second color and the third color are set to green (RGB value (0,128,0)) and black (RGB value (0,0,0)), respectively, when _G2 of the RGB value ( _R2 , _G2 , _B2 ) of the second unit 302 is within the range of 128- _c2 ≦ _G2 ≦128+ _c2 ' , the RGB value ( _R2 , _G2 , _B2 ) of the second unit 302 is converted to the RGB value (0,0,0) of black. That is, the color of the second unit 302 is converted to black, which is the third color set in advance, regardless of the amount of unevenness. Here, _c2 and _c2 ' are preset setting values, and can be set to any value such as 5, 10 or 20. In addition, c ₂ and c ₂ ' may be the same value or different values.

Similarly, when the RGB value (R ₃ , G ₃ , B ₃ ) of the third unit 303 obtained from the image data 310 is near the preset RGB value of the third color, the RGB value (R ₃ , G ₃ , B ₃ ) of the third unit 303 is converted into the preset RGB value of the third color. For example, when the third color is set to black (RGB value (0,0,0)), when R ₃ , G ₃ and B ₃ of the RGB value (R ₃ , G 3 , B ₃ ) of the third unit 303 are within the range of 0≦ _{R 3} , G ₃ , B ₃ ≦c ₃ , the RGB value (R ₃ , G ₃ , B ₃ ) of the third unit 303 is converted into the RGB value (0,0,0) of black. That is, the color of the third unit 303 is converted to black, which is the third color set in advance, regardless of the amount of unevenness. Here, _c3 is a preset setting value, which can be set to any value such as 5, 10 or 20. In addition, _c3 can be set to the same value or different values in each of _R3 , _G3 and _B3 .

Afterwards, the RGB values of the units other than the unit converted to the third color are converted to the background color, such as the RGB value of white (255,255,255).

Furthermore, the colors of the three cut marks 304 can also be converted to the third color that is preset.

Therefore, in the first filtering process in step S112C, all cells are converted to either the third color (e.g., black) or the background color (e.g., white).

In step S114C, the first acquisition unit 101 acquires the generated first two-dimensional code 320-1 through the first filtering process. The first two-dimensional code 320-1 includes a plurality of second units 302 and a plurality of third units 303 having a third color, and three cut marks 304 having a third color.

In step S122C, the second acquisition unit 102 performs a second filtering process on the image data 310. Specifically, when the RGB value (R ₁ , G ₁ , B ₁ ) of the first unit 301 acquired from the image data 310 is near the RGB value of the first color set in advance, the RGB value (R ₁ , G ₁ , B ₁ ) of the first unit 301 is converted into the RGB value of the third color set in advance. For example, when the first color and the third color are set to red (RGB value (255, 0, 0)) and black (RGB value (0, 0, 0)), respectively, when R ₁ of the RGB value (R ₁ , G ₁ , B ₁ ) of the first unit 301 is within the range of 255-c ₁ ≦R ₁ ≦255, the RGB value (R ₁ , G ₁ , B ₁ ) of the first unit 301 is converted to the RGB value (0, 0, 0) of black. That is, the color of the first unit 301 is converted to black, which is the third color set in advance, regardless of the amount of unevenness. Here, c ₁ is a preset setting value, and can be set to any value such as 5, 10, or 20.

Furthermore, referring to step S112C, when the RGB value (R ₃ , G ₃ , B ₃ ) of the third unit 303 included in the image data 310 is near the RGB value of the third color set in advance, the RGB value (R ₃ , G ₃ , B ₃ ) of the third unit 303 is converted into the RGB value of the third color set in advance. Thereafter, the RGB values of the units other than the units converted into the third color are converted into the background color, such as the RGB value (255, 255, 255) of white. Furthermore, the colors of the three cut marks 304 can also be converted into the third color set in advance.

Therefore, in the second filtering process in step S122C, all cells are converted to either the third color (e.g., black) or the background color (e.g., white).

In step S124C, the second acquisition unit 102 acquires the generated second two-dimensional code 320-2 through the second filtering process. The second two-dimensional code 320-2 includes a plurality of first units 301 and a plurality of third units 303 having a third color, and three cut marks 304 having a third color.

After step S124C, execute step S130. The reading process of the composite two-dimensional code 300 ends by executing step S130.

As described above, according to the reading process of the composite two-dimensional code 300 related to the present embodiment, the first two-dimensional code 320-1 and the second two-dimensional code 320-2 can obtain two-dimensional codes that are two-colored by the third color and the background color, regardless of the color difference of the image data 310. Therefore, not only mechanical copying of the two-dimensional code can be prevented, but also electronic copying can be prevented.

Furthermore, since the first two-dimensional code 320-1 and the second two-dimensional code 320-2 displayed in step S130 are two-color two-dimensional codes, no special reading device is required in reading the first two-dimensional code 320-1 and the second two-dimensional code 320-2.

〈Fifth Implementation Form〉

Referring to FIG. 13 to FIG. 15 , the reading process of the composite two-dimensional code 300D which is different from the first to fourth embodiments is described. In this embodiment, the composite two-dimensional code 300D shown in FIG. 13 is used.

FIG. 13 is a schematic diagram showing the structure of a composite two-dimensional code 300D related to one embodiment of the present invention.

As shown in FIG. 13 , the composite two-dimensional code 300D includes a plurality of first units 301 having a first color, a plurality of second units 302 having a second color, a plurality of third units 303 having a third color, three cut marks 304 having a third color, and a color code pattern portion 305D. In addition, in the present embodiment, there is a case where the portion including the plurality of first units 301 having a first color, the plurality of second units 302 having a second color, the plurality of third units 303 having a third color, and the three cut marks 304 having a third color is referred to as a unit pattern portion.

The color code pattern portion 305D is disposed outside the first unit 301, the second unit 302, the third unit 303, and the cut mark 304. The color code pattern portion 305D includes a first color code 305D-1, a second color code 305D-2, a third color code 305D-3, and a fourth color code 305D-4. The first color code 305D-1, the second color code 305D-2, and the third color code 305D-3 correspond to the first color of the first unit 301, the second color of the second unit 302, and the third color of the third unit 303, respectively. That is, the first color code 305D-1, the second color code 305D-2, and the third color code 305D-3 have the first color, the second color, and the third color, respectively. Also, the 4th color code 305D-4 has a background color.

The reading process of the composite two-dimensional code 300D in this embodiment can be performed using the information processing system 10D. In addition, when the structure of the information processing system 10D is the same as the structure of the information processing system 10, the description of the structure of the information processing system 10D may be omitted.

FIG. 14 is a block diagram showing the structure of an information processing system 10D for performing a reading process of a composite two-dimensional code 300D in one embodiment of the present invention.

As shown in FIG14 , the control unit 100 of the information processing system 10D includes a first acquisition unit 101, a second acquisition unit 102, and a calculation unit 103D.

The calculation unit 103D can obtain the RGB values of the first color code 305D-1, the second color code 305D-2, the third color code 305D-3 and the fourth color code 305D-4 of the color code pattern unit 305D from the image data 310. In addition, the calculation unit 103D can calculate the difference between the obtained RGB value and the RGB value of the pre-set color. Furthermore, the calculation unit 103D can add the calculated difference to the RGB value obtained from the image data 310.

Subsequently, the details of the color correction of the image data 310 are described with reference to FIG. 15. In addition, the description of the same structure as that described above may be omitted. Moreover, for convenience, the color correction processing of the image data 310 is described as a processing different from the first filtering processing and the second filtering processing. The color correction processing of the image data 310 may also be included in at least one of the first filtering processing and the second filtering processing.

FIG. 15 is a flowchart of the reading process of the composite two-dimensional code 300D related to one embodiment of the present invention.

The reading process of the composite two-dimensional code 300D starts by executing the program for the reading process of the composite two-dimensional code 300D in the information processing system 10.

In step S102D, the calculation unit obtains the RGB values of the first color code 305D-1, the second color code 305D-2, the third color code 305D-3, and the fourth color code 305D-4 of the color code pattern unit 305D from the image data 310. In addition, the calculation unit calculates the difference value (hereinafter referred to as "the first difference value") between the preset RGB value of the first color and the obtained RGB value of the first color code 305D-1. The calculation unit similarly calculates the difference between the RGB value of the pre-set second color and the RGB value of the obtained second color code 305D-2 (hereinafter referred to as the "second difference value"), the difference between the RGB value of the pre-set third color and the RGB value of the obtained third color code 305D-3 (hereinafter referred to as the "third difference value"), and the difference between the RGB value of the pre-set background color and the RGB value of the fourth color code 305D-4 (hereinafter referred to as the "fourth difference value"). In this way, the difference between the color of the composite two-dimensional code 300D and the color of the image data 310 caused by the difference in the information terminal 11 or the difference in the photography method or photography conditions can be detected.

In step S104D, the calculation unit corrects the colors of the first unit 301, the second unit 302, the third unit 303, and the cut mark 304 of the image data 310 and the background color according to the first difference value, the second difference value, the third difference value, and the fourth difference value. Specifically, the first difference value is added to the RGB value of the first unit 301 obtained from the image data 310. Similarly, the second difference value is added to the RGB value of the second unit 302, the third difference value is added to the RGB value of the third unit 303 and the cut mark 304, and the fourth difference value is added to the RGB value of the background color. In this way, the color of the image data 310 can be corrected to be close to the color of the composite two-dimensional code 300D.

After step S104D, step S112C is executed. The subsequent steps have been described in the fourth embodiment, so the description here is omitted. In addition, the steps after step S110 described in the first embodiment can also be implemented instead of the steps after step S112C. In this case, in step S130, the first two-dimensional code 320-1 and the second two-dimensional code 320-2 having a color close to the composite two-dimensional code 300 can be displayed.

In addition, in this embodiment, the RGB values of the first color code 305D-1, the second color code 305D-2, the third color code 305D-3, and the fourth color code 305D-4 obtained can be used as a reference to perform the first filtering process and the second filtering process without the need to calibrate the color of the image data 310.

〈Variation of the fifth implementation form〉

The structure of the color code pattern portion included in the composite two-dimensional code 300D is not limited to the color code pattern portion 305D shown in FIG13. Another structure of the color code pattern portion is described with reference to FIG16.

FIG. 16 is a schematic diagram showing the structure of another color code pattern portion included in a composite two-dimensional code 300D related to one embodiment of the present invention.

The color code pattern portion 305E shown in (A) of FIG. 16 includes a first color code 305E-1, a second color code 305E-2, and a third color code 305E-3. The first color code 305E-1, the second color code 305E-2, and the third color code 305E-3 are red (R), green (G), and blue (B), respectively. The color of any one of the first color code 305E-1, the second color code 305E-2, and the third color code 305E-3 is different from the first color of the first unit 301, the second color of the second unit 302, and the third color of the third unit 303. Here, the RGB value of red (R) is (255, 0, 0), the RGB value of green (G) is (0, 255, 0), and the RGB value of blue (B) is (0, 0, 255). Therefore, when the RGB values of the first color code 305E-1, the second color code 305E-2, and the third color code 305E-3 are obtained from the image data 310, and the obtained first color code 305E-1, the second color code 305E-2, and the third color code 305E-3 correspond to red (R), green (G), and blue (B), respectively, the offset (difference value △R) from the RGB value of red (R) can be calculated from the RGB value of the obtained first color code 305E-1, the offset (difference value △G) from the RGB value of green (G) can be calculated from the RGB value of the obtained second color code 305E-2, and the offset (difference value △B) from the RGB value of blue (B) can be calculated from the RGB value of the obtained third color code 305E-3. Therefore, in any of the first unit 301, the second unit 302 and the third unit 303, the color of the image data 310 can be corrected by adding the differential value (△R, △G, △B) to the RGB value of each unit to approach the color of the composite two-dimensional code 300D.

The color code pattern portion 305F shown in (B) of FIG. 16 includes a first color code 305F-1, a second color code 305F-2, a third color code 305F-3, and a fourth color code 305F-4. The first color code 305F-1, the second color code 305F-2, the third color code 305F-3, and the fourth color code 305F-4 are cyan (C), magenta (M), yellow (Y), and black (K), respectively. The color of any one of the first color code 305F-1, the second color code 305F-2, the third color code 305F-3, and the fourth color code 305F-4 is different from the first color of the first unit 301, the second color of the second unit 302, and the third color of the third unit 303. Here, for example, the CMYK value of cyan (C) is (100, 0, 0, 0), the CMYK value of magenta (M) is (0, 100, 0, 0), the CMYK value of yellow (Y) is (0, 0, 100, 0), and the CMYK value of black (K) is (0, 0, 0, 100). Also, for example, the RGB value of cyan (C) is (0, 174, 239), the RGB value of magenta (M) is (255, 0, 255), the RGB value of yellow (Y) is (255, 255, 0), and the RGB value of black (K) is (0, 0, 0). In this case, the RGB values of the first color code 305F-1, the second color code 305F-2, the third color code 305F-3, and the fourth color code 305F-4 are obtained from the image data 310, and the difference values are calculated by corresponding to the RGB values of cyan (C), magenta (M), yellow (Y), and black (K). Specifically, the difference value △C of the first color code 305F-1, the difference value △M of the second color code 305F-2, the difference value △Y of the third color code 305F-3, and the difference value △K of the fourth color code 305F-5 are as shown in formula (1).

『Number 1』△C=(△R _C ,△G _C ,△B _C ) △M=(△R _M ,△G _M ,△B _M ) △Y=(△R _Y ,△G _Y ,△B _Y ) △K=(△R _K ,△G _K ,△B _K )‧‧‧(1)

When the CMYK value of the color of the first unit 301 of the composite two-dimensional code 300D is preset as (C ₁ , M ₁ , Y ₁ , K ₁ ), the difference value (△R ₁ , △G ₁ , △B ₁ ) of the RGB value of the first unit 301 obtained from the image data 310 can be calculated by formula (2). Here, α is a weight coefficient, which may change due to the CMYK value or RGB value of cyan (C), magenta (M), yellow (Y) and black (K) that is preset as described above.

『Number 2』△R ₁ = α _R ×(C ₁ ×△R _C +M ₁ ×△R _M +Y ₁ ×△R _Y +K ₁ ×△R _K ) △G ₁ = α _G ×(C ₁ ×△G _C +M ₁ ×△G _M +Y ₁ ×△G _Y +K ₁ ×△G _K ) △B ₁ = α _B ×(C ₁ ×△B _C +M ₁ ×△B _M +Y ₁ ×△B _Y +K ₁ ×△B _K )‧‧‧(2)

Formula (2) is the difference value of the RGB value of the first unit 301, and the difference values of the RGB value of the second unit 302, the RGB value of the third unit 303, and the RGB value of the background color can also be calculated. Therefore, in any of the first unit 301, the second unit 302, the third unit 303, and the background, the color of the image data 310 can be corrected by adding the difference value (△R, △G, △B) to the RGB value of each, so as to be close to the color of the composite two-dimensional code 300D.

As described above, according to the reading process of the composite two-dimensional code 300D related to this embodiment, even if the color of the image data 310 is different from the color of the composite two-dimensional code 300, the first two-dimensional code 320-1 and the second two-dimensional code 320-2 can be corrected to a color close to the composite two-dimensional code 300. Therefore, not only mechanical copying of the two-dimensional code can be prevented, but also electronic copying can be prevented.

〈Sixth Implementation Form〉

Referring to FIG. 17 , the reading process of the composite two-dimensional code 300 different from the first to fifth embodiments is described. The reading process of the composite two-dimensional code 300 in this embodiment can be performed using the information processing system 10, and the first acquisition unit 101 and the second acquisition unit 102 included in the control unit 100 can realize further functions. The following description of the same structure as the above-mentioned structure is omitted.

The first acquisition unit 101 can read the first two-dimensional code 320-1 generated by the first filtering process and acquire the information contained in the first two-dimensional code 320-1.

The second acquisition unit 102 can count the number of units converted through the second filtering process. In addition, the second acquisition unit 102 can determine whether the specified condition is met based on the information obtained by the first acquisition unit 101 and the information obtained by the second acquisition unit 102 through counting.

FIG. 17 is a flowchart of the reading process of the composite two-dimensional code 300 related to one embodiment of the present invention.

The reading process of the composite two-dimensional code 300 is started by executing the program for the reading process of the composite two-dimensional code 300 in the information processing system 10.

In step S112G, the first acquisition unit 101 performs the first filtering process on the image data 310. In this embodiment, for convenience, the first filtering process is defined as the color reduction process for explanation, but the first filtering process in this embodiment is not limited to this.

In the first filtering process, the second unit 302 having the second color is eliminated from the image data 310. Specifically, the color of the second unit 302 is converted from the second color to the background color. In the first filtering process, the first color of the first unit 301, the second color of the second unit 302, the third color of the third unit 303, and the background color may be adjusted. For example, the chroma of the first color and the second color may be adjusted, and the brightness of the third color and the background color may be adjusted. By adjusting the colors in this way, the outline of the second unit 302 having the second color may be made clear, and the boundaries of the first unit 301, the second unit 302, and the third unit 303 may be made clear. In the first filtering process, after the image data 310 is adjusted in this way, the second unit 302 having the second color can also be eliminated from the adjusted image data 310. In addition, if the background color is not white, the background color can also be adjusted to white when the image data 310 is adjusted.

In step S114G, the first acquisition unit 101 acquires the first two-dimensional code 320-1 generated by the first filtering process. The first two-dimensional code 320-1 includes a plurality of first units 301 having a first color, a plurality of third units 303 having a third color, and three cut marks 304 having a third color. In addition, the first two-dimensional code 320-1 acquired can also be converted from the first color to the third color. That is, the first two-dimensional code 320-1 acquired can also be a two-color two-dimensional code converted into a plurality of third units 303 and three cut marks 304 and a background color.

In step S116G, the first acquisition unit 101 reads the first two-dimensional code 320-1 and acquires the information contained in the first two-dimensional code 320-1. Here, the first two-dimensional code 320-1 includes information about the number of the first unit in the composite two-dimensional code 300 (hereinafter referred to as "the first unit's included number information"). That is, in step S116G, the first unit's included number information is acquired.

In step S122G, the second acquisition unit 102 performs a second filtering process on the image data 310. In this embodiment, for convenience, the second filtering process is described as a color reduction process, but the second filtering process in this embodiment is not limited to this.

In the second filtering process, the first unit 301 having the first color is eliminated from the image data 310. Specifically, the color of the first unit 301 is converted from the first color to the background color. In the second filtering process, the first unit 301 having the first color can also be eliminated from the image data 310 adjusted by the first filtering process. In addition, in the second filtering process, the number of the eliminated first units 301 is counted. That is, in the second filtering process, information about the number of eliminated first units 301 is obtained (hereinafter referred to as "first unit elimination number information").

In step S123G, the second acquisition unit 102 determines whether the specified condition is satisfied based on the number of items contained in the first unit and the number of items eliminated in the first unit. For example, the specified condition is whether the number of items eliminated in the first unit is included in the range of (1-a) times or more and (1+a) times or less than the number of items contained in the first unit. Here, a is a preset value, which can be set to any value such as 0.05, 0.1 or 0.15. When the specified condition is satisfied (step S123G: YES), step S124G is executed. On the other hand, if the specified conditions are not met (step S123G: NO), the reading process of the composite two-dimensional code 300 ends. In this case, the composite two-dimensional code 300 may be counterfeited, so an alarm indicating that the composite two-dimensional code 300 cannot be read may be generated and the user may be prompted with the alarm.

In step S124G, the first acquisition unit 101 acquires the second two-dimensional code 320-2 generated by the second filtering process. The second two-dimensional code 320-2 includes a plurality of second units 302 having a second color, a plurality of third units 303 having a third color, and three cutting marks 304 having a third color. In addition, the acquired second two-dimensional code 320-2 can also be converted from the second color to the third color. That is, the acquired second two-dimensional code 320-2 can also be a two-color two-dimensional code of the third color converted into a plurality of third units 303 and three cutting marks 304 and a background color.

After step S124G, execute step S130. The reading process of the composite two-dimensional code 300 ends by executing step S130.

<Variation 1 of the 6th implementation form>

The information about the number of first units contained in the first two-dimensional code 320-1 may also be multiple, not just one. For example, the composite two-dimensional code 300 is divided into four regions, each of which contains three regions containing one cut mark 304 and one region not containing the cut mark 304. The information about the number of first units contained may also be information about the number of first units contained in each of the four regions. In this case, in step S112C, the number of first units 301 that have been eliminated is counted in each of the four regions of the image data 310 corresponding to the four regions of the composite two-dimensional code 300. That is, the information about the number of first units eliminated includes the number of four first units 301 eliminated in each of the four regions.

In addition, the number of divided regions is not limited to 4. In addition, the regions can be continuous or discontinuous. Furthermore, the areas of the regions can be the same or different.

Furthermore, in step S123G, it is determined whether the above-mentioned specified conditions are satisfied in each of the four areas. Furthermore, in step S123G, determination can also be made based on the determination results in the four areas. Specifically, when the number of areas determined to satisfy the specified conditions is greater than a preset value, step S123G is executed to obtain the second two-dimensional code 320-2. On the other hand, when the number of areas determined to satisfy the specified conditions does not reach the preset value, the reading process of the composite two-dimensional code 300 is terminated.

<Variation 2 of the 6th implementation form>

The specified condition in step S123G is not limited to the condition based on the information of the number of units contained in the first unit and the information of the number of units deleted in the first unit. For example, the first two-dimensional code 320-1 may also include information about the ratio of the first unit relative to the rectangle surrounded by the three cut marks of the composite two-dimensional code 300 (hereinafter referred to as "the first unit's contained ratio information"). The ratio information of the first unit is obtained in step S116G. In this case, in step S122G, information about the ratio of the deleted first unit 301 relative to the rectangle surrounded by the three cut marks 304 is obtained in the image data 310 (hereinafter referred to as "the first unit's deleted ratio information"). Therefore, in step S123G, it is determined whether the elimination ratio information of the first unit is included in the range of (1-a) times or more and (1+a) times or less than the content ratio information of the first unit.

<Variation 3 of the 6th implementation form>

In step S116G, the number of units contained in the first unit can also be obtained by reading the QR code that has been processed by adding units to the first QR code 320-1 or deleting units from the first QR code 320-1, rather than directly reading the first QR code 320-1. In this case, the QR code that has added units to the pre-set area of the first QR code 320-1 or deleted units from the pre-set area of the first QR code 320-1 includes the number of units contained in the first unit, and the first QR code 320-1 may include other information.

Furthermore, in step S116G, the designated area of the first two-dimensional code 320-1 can be extracted, and the number of units contained in the first unit can be obtained according to the area pattern of the extracted area. For example, a database that associates area patterns with the number of units contained in the first unit can be pre-registered, and the number of units contained in the first unit can be obtained by comparing the area pattern of the extracted area with the database.

As described above, in the reading process of the composite two-dimensional code 300 related to the present embodiment, when obtaining the second two-dimensional code 320-2, the parameters in the specified judgment condition are obtained according to the information contained in the generated first two-dimensional code 320-1 or the information obtained by using the generated first two-dimensional code 320-1, and a judgment is made as to whether the specified judgment condition is met. Therefore, if the specified condition is met, the second two-dimensional code 320-2 can be obtained. Therefore, not only mechanical copying of the two-dimensional code can be prevented, but also electronic copying can be prevented.

The various embodiments described above as embodiments of the present invention can be implemented in appropriate combinations as long as they do not contradict each other. Moreover, any addition, deletion or design change of appropriate constituent elements made by a person with ordinary knowledge in the technical field to which the present invention belongs based on each embodiment is also included in the scope of the present invention as long as it has the gist of the present invention.

Furthermore, even if the effects are different from the effects brought about by the above-mentioned embodiments, they are understood to be obvious from the description of this specification, or easily predictable to a person with ordinary knowledge in the technical field to which the present invention belongs, and should be brought about by the present invention.

300: Composite QR code

301: Unit 1

302: Unit 2

303: Unit 3

304: Cut mark

Claims (26)

An information processing system includes: a first acquisition unit for performing a first filtering process on a composite two-dimensional code including a first unit having a first color, a second unit having a second color, and a third unit having a third color to obtain a first two-dimensional code, and a second acquisition unit for performing a second filtering process on the composite two-dimensional code to obtain a second two-dimensional code, wherein the first acquisition unit obtains the RGB value of the second unit from image data of the composite two-dimensional code, and when the RGB value of the second unit is included in a first range based on the RGB value of the second color, the first acquisition unit performs the filtering process. The color of the second unit is converted into the third color by the first filtering process, and the first two-dimensional code including the second unit and the third unit having the third color is obtained. The second obtaining unit obtains the RGB value of the first unit from the image data. When the RGB value of the first unit is included in the second range based on the RGB value of the first color, the second filtering process is performed to convert the color of the first unit into the third color, and the second two-dimensional code including the first unit and the third unit having the third color is obtained. An information processing system as described in claim 1, wherein in the aforementioned first filtering process, the color of the aforementioned second unit and the color of the aforementioned first unit that are not included in the aforementioned first range are further converted into the background color of the aforementioned composite two-dimensional code, and in the aforementioned second filtering process, the color of the aforementioned first unit and the color of the aforementioned second unit that are not included in the aforementioned second range are further converted into the background color of the aforementioned composite two-dimensional code. The information processing system as described in claim 1, wherein the aforementioned composite two-dimensional code further comprises a first color code having a fourth color, a second color code having a fifth color, and a third color code having a sixth color, and the information processing system further comprises a calculation unit, which calculates the first difference value between the RGB value of the aforementioned first color code and the RGB value of the fourth color, the second difference value between the RGB value of the aforementioned second color code and the RGB value of the fifth color, and the third difference value between the RGB value of the aforementioned third color code and the RGB value of the sixth color in the aforementioned image data, and corrects the colors of the aforementioned first unit, the aforementioned second unit, and the aforementioned third unit according to at least one of the aforementioned first difference value, the aforementioned second difference value, and the aforementioned third difference value. The information processing system as described in claim 3, wherein in the aforementioned first filtering process, the color of the aforementioned second unit not included in the aforementioned first range and the color of the aforementioned first unit are further converted into the background color of the aforementioned composite two-dimensional code, and in the aforementioned second filtering process, the color of the aforementioned first unit not included in the aforementioned second range and the color of the aforementioned second unit are further converted into the background color of the aforementioned composite two-dimensional code. An information processing system as described in claim 3, wherein the aforementioned first color, the aforementioned second color, and the aforementioned third color are respectively the same as the aforementioned fourth color, the aforementioned fifth color, and the aforementioned sixth color. The information processing system as described in claim 3, wherein the aforementioned fourth color, the aforementioned fifth color, and the aforementioned sixth color are red, green, and blue, respectively. The information processing system as described in claim 3, wherein the aforementioned fourth color, the aforementioned fifth color, and the aforementioned sixth color are cyan, magenta, and yellow, respectively. An information processing system includes: a first acquisition unit for performing a first filtering process on a composite two-dimensional code including a first unit having a first color, a second unit having a second color, and a third unit having a third color to obtain a first two-dimensional code, and a second acquisition unit for performing a second filtering process on the composite two-dimensional code to obtain a second two-dimensional code, wherein the first acquisition unit performs the first filtering process on the image data of the composite two-dimensional code to convert the second unit having the second color to obtain the first two-dimensional code including the first unit having the first color and the third unit having the third color. After the composite two-dimensional code is obtained, the first numerical information about the number of the first unit with the first color contained in the composite two-dimensional code is obtained according to the first two-dimensional code obtained above. The second acquisition unit performs the second filtering process of converting the first unit with the first color in the image data to obtain the second numerical information about the number of the converted first unit with the first color. When the second numerical information satisfies the specified condition according to the first numerical information, the second two-dimensional code containing the second unit with the second color and the third unit with the third color is obtained. The information processing system as described in claim 8, wherein the aforementioned specified condition is that the aforementioned second numerical information is within the range of (1-a) times or more and (1+a) times or less than the aforementioned first numerical information, and a is a pre-set setting value. An information processing system includes: a first acquisition unit for performing a first filtering process on a composite two-dimensional code including a first unit having a first color, a second unit having a second color, and a third unit having a third color to obtain a first two-dimensional code, and a second acquisition unit for performing a second filtering process on the composite two-dimensional code to obtain a second two-dimensional code, wherein the first acquisition unit performs the first filtering process on the image data of the composite two-dimensional code to convert the second unit having the second color, obtains the first two-dimensional code including the first unit having the first color and the third unit having the third color, and then performs a second filtering process on the composite two-dimensional code to obtain a second two-dimensional code according to the first filtering process. The aforementioned first two-dimensional code is obtained, and the first ratio information about the ratio of the first unit having the aforementioned first color to the aforementioned composite two-dimensional code is obtained. The aforementioned second acquisition unit performs the aforementioned second filtering process of converting the first unit having the aforementioned first color in the aforementioned image data, and obtains the second ratio information about the ratio of the converted first unit having the aforementioned first color to the aforementioned composite two-dimensional code. When the aforementioned second ratio information satisfies the specified condition based on the aforementioned first ratio information, the aforementioned second two-dimensional code including the second unit having the aforementioned second color and the third unit having the aforementioned third color is obtained. The information processing system as described in claim 10, wherein the aforementioned specified condition is that the aforementioned second ratio information is within the range of (1-a) times or more and (1+a) times or less than the aforementioned first ratio information, and a is a pre-set setting value. An information processing system as described in any one of claim 1 to claim 11, wherein the first color and the second color are in a complementary color relationship. An information processing system as described in any one of claim 1 to claim 11, wherein the third color is black. A program for executing on a computer: performing a first filtering process on a composite two-dimensional code including a first unit having a first color, a second unit having a second color, and a third unit having a third color to obtain a first two-dimensional code, performing a second filtering process on the composite two-dimensional code to obtain a second two-dimensional code, wherein in the first filtering process, the RGB value of the second unit is obtained from the image data of the composite two-dimensional code, and the RGB value of the second unit is included in a first range based on the RGB value of the second color. When the color of the second unit is converted into the third color, in the second filtering process, the RGB value of the first unit is obtained from the image data, and when the RGB value of the first unit is included in the second range based on the RGB value of the first color, the color of the first unit is converted into the third color. The first two-dimensional code includes the second unit and the third unit having the third color, and the second two-dimensional code includes the first unit and the third unit having the third color. The program as claimed in claim 14, wherein in the aforementioned first filtering process, the color of the aforementioned second unit not included in the aforementioned first range and the color of the aforementioned first unit are further converted into the background color of the aforementioned composite two-dimensional code, and in the aforementioned second filtering process, the color of the aforementioned first unit not included in the aforementioned second range and the color of the aforementioned second unit are further converted into the background color of the aforementioned composite two-dimensional code. The program as described in claim 14, wherein the aforementioned composite two-dimensional code further includes a first color code having a fourth color, a second color code having a fifth color, and a third color code having a sixth color, and further executes on the aforementioned computer: in the aforementioned image data, calculate the first difference between the RGB value of the aforementioned first color code and the RGB value of the fourth color, the second difference between the RGB value of the aforementioned second color code and the RGB value of the fifth color, and the third difference between the RGB value of the aforementioned third color code and the RGB value of the sixth color, and calibrate the colors of the aforementioned first unit, the aforementioned second unit, and the aforementioned third unit according to at least one of the aforementioned first difference, the aforementioned second difference, and the aforementioned third difference. The program as claimed in claim 16, wherein in the aforementioned first filtering process, the color of the aforementioned second unit not included in the aforementioned first range and the color of the aforementioned first unit are further converted into the background color of the aforementioned composite two-dimensional code, and in the aforementioned second filtering process, the color of the aforementioned first unit not included in the aforementioned second range and the color of the aforementioned second unit are further converted into the background color of the aforementioned composite two-dimensional code. The program as described in claim 16, wherein the first color, the second color, and the third color are respectively the same as the fourth color, the fifth color, and the sixth color. The program as described in claim 16, wherein the aforementioned fourth color, the aforementioned fifth color, and the aforementioned sixth color are red, green, and blue, respectively. The program as described in claim 16, wherein the aforementioned fourth color, the aforementioned fifth color, and the aforementioned sixth color are cyan, magenta, and yellow, respectively. A program for executing on a computer: performing a first filtering process on a composite two-dimensional code including a first unit having a first color, a second unit having a second color, and a third unit having a third color to obtain a first two-dimensional code, performing a second filtering process on the composite two-dimensional code to obtain a second two-dimensional code, wherein the first filtering process is performed to convert the second unit having the second color in the image data of the composite two-dimensional code, and after obtaining the first two-dimensional code including the first unit having the first color and the third unit having the third color, the first two-dimensional code is filtered according to the first filtering process. The aforementioned first two-dimensional code is obtained, and the first numerical information about the number of the first unit having the aforementioned first color contained in the aforementioned composite two-dimensional code is obtained. In the aforementioned image data, the aforementioned second filtering process is performed to convert the first unit having the aforementioned first color, and the second numerical information about the number of the converted first unit having the aforementioned first color is obtained. When the aforementioned second numerical information satisfies the specified condition based on the aforementioned first numerical information, the aforementioned second two-dimensional code including the second unit having the aforementioned second color and the third unit having the aforementioned third color is obtained. A program as described in claim 21, wherein the aforementioned specified condition is that the aforementioned second numerical information is within the range of (1-a) times or more and (1+a) times or less than the aforementioned first numerical information, and a is a pre-set setting value. A program for executing on a computer: performing a first filtering process on a composite two-dimensional code including a first unit having a first color, a second unit having a second color, and a third unit having a third color to obtain a first two-dimensional code, performing a second filtering process on the composite two-dimensional code to obtain a second two-dimensional code, wherein in the image data of the composite two-dimensional code, the first filtering process is performed to convert the second unit having the second color, and after obtaining the first two-dimensional code including the first unit having the first color and the third unit having the third color, the first filtering process is performed according to the obtained second two-dimensional code. 1 two-dimensional code, obtain the first ratio information about the ratio of the first unit having the first color to the composite two-dimensional code, perform the second filtering process of converting the first unit having the first color in the image data, obtain the second ratio information about the ratio of the converted first unit having the first color to the composite two-dimensional code, and when the second ratio information satisfies the specified condition based on the first ratio information, obtain the second two-dimensional code including the second unit having the second color and the third unit having the third color. A program as described in claim 23, wherein the aforementioned specified condition is that the aforementioned second ratio information is within the range of (1-a) times or more and (1+a) times or less than the aforementioned first ratio information, and a is a pre-set setting value. A program as described in any one of claim 14 to claim 24, wherein the first color and the second color are in a complementary color relationship. A program as described in any one of claim 14 to claim 24, wherein the third color is black.

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